Flanging tool



Dec. 21, 1943. A. F. NORDGREN FLANGING. TOOL Filed May 13, 1942 FatentedDec. 21, 1943 FLANGING TOOL Albert F. Nordgren, Omaha, Nebr.

Application May 13, 1942, Serial No. 442,813

1 Claim.

The invention relates to improvements in means for flanging openings inmetal, and particularly for forming flanges around openings in wastelead articles, and the primary object of the invention is to provide asimple, relatively inexpensive and relatively small-sized tool of thischaracter.

Other important objects and advantages of the invention will be apparentfrom a reading of the following description taken in connection with theappended drawing, wherein for purposes of illustration a preferredembodiment of the invention is shown.

In the drawing:

Figure 1 is a general side elevational view of the embodiment showingthe same applied to work.

Figure 2 is an end elevational view of Figure 1.

Figure 3 is a transverse vertical sectional View taken through Figure 2along the line 33, and looking toward the lines in the direction of thearrows.

Figure 4 is a top plan view of Figure 2.

Referring in detail to the drawing, the numeral 5 generally designatesthe improved flanging tool which comprises a standard which is generallydesignated 6 which consists of an inverted U- shape with the legs 1diverging downwardly and connected together by semi-circular elements 8,the elements 8 being preferably integral with the legs and formed toimmediately merge with the lower ends of lateral reinforcing flanges 9which extend up along the opposite sides of the legs I and along thebight portion to join the substantially cylindrical tubular element 10which is located at the middle of the bight portion and extends onopposite sides of the legs as shown in Figure 2 of the drawing and alsoin Figure 4 thereof.

The under surface of the semi-circular elements 8 are longitudinallyupwardly curved or bowed as indicated by the numeral II and alsotransversely downwardly curved or bowed as indicated by the numeral l2in Figure 2. The longitudinal curvature II is to generally conform tothe curved surface of a cylindrical or other similarly curved waste leador similar material article l3.

The present device further comprises the flanging element which isgenerally designated M which comprises a solid frusto-conical top l5which is provided with an axial threaded bore It, the base of thefrusto-conical portion terminating in a relatively uniform cylindricalportion I'I whose lower end merges into an enlarged bulbous portion IS.The flanging element 14 has a vertical screw l9 threaded in the bore l6and has a smooth portion 20 turning in the bore 2| of the cylindricalelement 10 at the top of the standard 6. Above the smooth portion 253 isa combined bearing and stop flange 22 which rotatably bears upon theupper end of the element A crank handle 23, preferably integral with thescrew projects laterally from the stop flange 22.

In utilizing the device of the invention a hole 26 is first formed inthe work I3 and the frustoconical top 15 of the flanging element Id isthen placed in the hole, whereupon the standard it is axially alignedwith the flanging element and the screw I9 is threaded in the hole it ofthe flanging element. The crank handle 23 is then operated in adirection to thread the flanging element 14 toward the base portion ofthe standard, thereby causing the flanging element to move through thehole 24 and enlarge the same, and at the same time turn the edges of thehole up to form the desired flange 25. Upon completion of the flange thetool is removed in an obvious manner.

Although there is shown and described herein a preferred embodiment ofthe invention, it is to be definitely understood that I do not desire tolimit the application of the invention thereto except as may be requiredby the scope of the subjoined claim.

Having described the invention, what is claimed as new 1s:

A flanging tool of the character described, said tool comprising aflanging element to enter a hole formed in the work, said flangingelement being provided with an axial threaded bore, a standard forengaging the work around the hole at the opposite side from the flangingelement, a bearing on said standard axially alignable with the threadedbore of the flanging element, a screw journaled in said standard andthreadable in the bore of the flanging element, and means for rotatingthe screw to draw the flanging element toward the standard to push theedges of the hole of the work laterally with respect to the work to formthe desired flange, said standard comprising an open-work frame having abase substantially circular and provided with a bottom edge includingdiametrically opposite convex portions and similarly arranged concaveportions intermediate the convex portions whereby said base is adaptedto conformably tit against a cylindrlcal piece of work, said hangingelement having a reduced tapered front end tip to enter a hole, anintermediate substantially cylindrical portion for establishing theinternal diameter of the nange around the hole, and an enlarged bulbousrear end for wedging into the flange to pre-- vent the element frombeing drawn through the hole.

ALBERT F. NORDGREN,

